Use canonical colors for MutType plots #329
Description
In plots showing mutations colored by MUTTYPE, use canonical mutation type colors (as shown in https://cancer.sanger.ac.uk/signatures/sbs/); those are:
C>A=#5abdeb
C>G=#050708
C>T=#d43c32
T>A=#cbcacb
T>C=#aacb72
T>G=#e7c9c6